Key legal question
Whether the valid income was correctly determined, including entitlement to a 13th monthly salary.
Extracted holding
The lower court's valid-income finding was manifestly incorrect because it failed to include the 13th salary, which the claimant would have been entitled to receive.
Extracted reasoning
The employer's records, prior accident and sickness reports, and the collective agreement for the construction industry showed an actual and legal entitlement to a 13th salary; using annual hours only covered holiday compensation, not the 13th salary.